Who owns the copyright in the relevant copyrighted work in the following scenarios?

1. Bambauer writes the next Great American Novel, and Homer buys the original, unpublished manuscript.

2. Bambauer dictates the next Great American Novel to Homer, who types it into Microsoft Word and saves it.

3. Bambauer writes and sells copies of a version of "Harry Potter and the Deathly Hallows" (a novel by J.K. Rowling) with a different ending.

4. Homer, having spent the last 20 years unconscious due to beer consumption, awakens and immediately writes"American Idiot"(a rock opera also created by Green Day).

5. Bambauer and Homer write the next Great American Novel as a chain novel(where each person writes every other sentence).

6. Bambauer writes the next Great American Novel; Homer corrects his spelling mistakes and re-orders the chapters.

7. Bambauer writes the next Great American Novel, then tells Homer, "The copyright is yours!"